Hi - a lot of antenna tuners are in fact high pass networks, so instead of
providing
suppression of harmonics you do the opposite!!
John ZS5JF
----------
> From: Jon Ogden <jono@enteract.com>
> To: km1h@juno.com; amps@contesting.com
> Subject: Re: [AMPS] Amp opinion/infomation requested ASAP!!
To: <amps@contesting.com>
> Date: 30 March 1999 12:40
>
>
> >I do not own an antenna tuner and have no need for another device of
> >questionable efficiency.
>
> I understand why folks do this, especially after having some arcing
> problems in my tuner on 80m during the WPX contest (had to do an
> emergency cap repair on my output cap in the tuner - a plate had some
> serious meltdown!). However, there are a couple of reasons why I like
> the concept of a tuner. For one, it gives an additional layer of
> harmonic filtering. Second, low pass filters are designed to have their
> lowpass response based on a 50 Ohm input and output and third, power
> meters are pretty much designed the same way.
>
> So how do you get around this? Having a power meter on a non-50 Ohm
> system probably isn't a big deal. But I think it could be a big deal
> with the lowpass filter. Or do you not run a lowpass filter and count on
> the harmonic suppression in the tank circuit to be good enough?
>
> 73,
>
> Jon
> KE9NA
>
>
> --------------------------------------------------------------------------
> Jon Ogden
>
> jono@enteract.com
> www.qsl.net/ke9na
>
> "A life lived in fear is a life half lived."
>
>
> --
> FAQ on WWW: http://www.contesting.com/ampfaq.html
> Submissions: amps@contesting.com
> Administrative requests: amps-REQUEST@contesting.com
> Problems: owner-amps@contesting.com
> Search: http://www.contesting.com/km9p/search.htm
--
FAQ on WWW: http://www.contesting.com/ampfaq.html
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|